“The killer (in Las Vegas) had a collection of semi-automatic weapons which a person in his position would simply not be able to acquire in Australia, ” Mr Turnbull told reporters in Sydney.

American man Stephen Paddock (64) was armed with multiple assault rifles and opened fired on an outdoor country music festival in Las Vegas from a high-rise hotel window on Sunday, killing 58 people before shooting himself in the deadliest mass shooting in modern US history.